振动搅拌水泥稳定砂砾强度性能对比研究

发布时间：2018-01-20 05:28

本文关键词： 道路工程振动搅拌水泥稳定砂砾混合料抗压强度变异系数　出处：《重庆交通大学学报(自然科学版)》2017年11期 　论文类型：期刊论文

【摘要】：为了给西藏地区实体工程推荐较优的水泥稳定砂砾的拌和方式,采用室内无侧限抗压强度试验和实体工程取芯强度试验,对常规拌和工艺与振动搅拌工艺下不同养生龄期的水泥稳定砂砾的抗压强度变化规律及其变异系数进行了对比研究。试验结果表明:在西藏阿里地区特殊气候环境下,水泥稳定砂砾混合料的抗压强度增长相对缓慢;相比常规搅拌工艺,采用振动搅拌工艺后水泥稳定砂砾混合料的强度变异系数有所减小,混合料拌和更加均匀,抗压强度可提高10%~15%,路用性能得以提升;在相同设计抗压强度条件下可减少水泥用量,节约工程造价,减少基层裂缝,建议在西藏筑路材料匮乏地段可采用振动搅拌技术提高水泥稳定基层的强度和稳定性。
[Abstract]:In order to recommend a better mixing method of cement stabilized sand gravel for solid engineering in Tibet, indoor unconfined compressive strength test and solid engineering coring strength test were adopted. The variation of compressive strength and coefficient of variation of cement stabilized gravel in different curing ages under conventional mixing process and vibration stirring process were studied. The experimental results showed that:. Under the special climatic environment in Ali region of Tibet. The compressive strength of cement stabilized gravel mixture increases slowly; Compared with the conventional mixing process, the strength variation coefficient of cement stabilized sand gravel mixture is reduced, the mixture mixing is more uniform, and the compressive strength can be increased by 10% or 15%. Road performance can be improved; Under the condition of the same design compressive strength, the cement consumption can be reduced, the engineering cost can be saved, and the cracks of the base course can be reduced. It is suggested that vibration agitation technology can be used to improve the strength and stability of cement stabilized base in Tibet.
【作者单位】：招商局重庆交通科研设计院有限公司;西藏自治区交通勘察设计研究院;重庆交通大学土木工程学院;
【基金】：交通运输部建设科技项目(2014 318 J15 070) 重庆市社会民生科技创新项目(cstc2015shmszx30010) 重庆市交通委员会科技项目(2016-04) 云南省交通运输厅科技项目((2016)140(B))
【分类号】：U414
【正文快照】： 0引言我国高等级公路沥青路面基层大都采用半刚性材料铺筑,具有整体性能好、承载能力强、经济适用等特点,在我国强基薄面的公路建设中起到了重要作用;但随着工程经验的增加,发现常规水泥稳定拌和工艺存在一定的缺点,水泥、水、集料等原材料在常规拌和工艺下得不到充分混合,导

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